# All files / src/column MyStore.js

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     import { useSyncExternalStore } from 'react';

    export default function MyStore() {
      const data = useSyncExternalStore(
        callback => {
          window.addEventListener('storage', callback);
          return () => window.removeEventListener('storage', callback);
        },
        () => localStorage.getItem('MY_REACT')
      );
      return (
        <p>localStorage：{data}</p>
      );
    }